Change-speed gearing.



V. H. McDOUGAL. CHANGE SPEED GEARlNG.

APPLICATION FILED JUNE 25. 1914.

Patented. July 20, 1915.

4 SHEETS-SHEET Il.

A TTUH/VEYS coLUMBIA PMNOURAPH co.,wlHlNnTON. D. c.

V. H. MCDOUGAL.

CHANGE SPEED GEARING.

APPLICATION FILED IuNE 25, I9I4.

miv. i H 8 12 m n OIM N N 2M W W YH J a m .mn

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.333 Va-ZWEJVQMQZ z i 1 mn 4 WM a COLUMBIA PLANOGRAPH Co.. WASHINGTON. D. c.

v.-H. MCDOUGAL.

CHANGE SPEED GARING.

APPLICATION FILED JUNE 25, 1914.

1,147,524. Patented July 20, 1915.

4 SHEETS-SHEET 3.

cnLUMBxA PLANouRAFH co.,wAsHlNaToN. D, C. l

v. H. McDouGAL.

CHANGE SPEED GEARING.

APPLICATION FILED JUN 1,147,524. Patented July 20, 1915.

4 EEEEEEEEEEEE 4.

WITNESSES By @g@ Mig ,4mm/vers WEA/TOR VICTOR H.;y MDOUGAL; i oFY ivovrrrmonrivs'oir, v omo.

specification of Letters Ptnt.-

Patented Jmyiz'o; 9515:

Beit-known that I,- V'IoroRfH; McDoUGAL',

a citizen of the 'UnitedStates,I and' a3 resi`r dent of* Northk Robinson, in@theeounty2 of5 Crawford and State of Ohio, have invented a nevv andinproved Change-'Speed' Gearing, ofl vvhiclr-the1 'follovvingifis a full, clear, and veX/act"l desoriptionrFhvis 'invention' relates to 'transmission del vices: for" traction' vehiclesor* other machinery, and@ has particular reference toy change f speed meohanism;

.Alriongfthey obj eots 'of he y"invention is to provide a plurality fof f possibleV speeds from a driving elementhaving' con's'tant'uniform speed andeach?speedibeing'fthrough a' direct drive; V y

Anotherfobjeot offtheinv'entionfis tolgen'# erally improve' this claS'Sf' of maohineryf with a vi'eW tol making. the devi'oesm'ore lefficient and vreliable 'inlpracticalservice.I

The foregoing and other objects ofthe invention lvvill' hereinafter be moreif'ull'y -desorib'e'd' and`l claimed and illustratedA inf Pth'e drawings' formingf av part of'f this f spee'ioai tion" in W'hioh like -eharaoters of reference" Fignrel l is a horizontal sectional viewl showing' a' preferred embodiment 4of my 'inl vention, the section' being? on' the line"l`-l ofFig: 2; Figl'2 is'awertical section sub stantially -on the broken line 2-2 lof-*Figll Fig.v 3 vis a similar view yon'the line Fig; 4 a detailj indicating-' the shifting; mechanism inl'meutraly position; Fig? 5 'is' similar View showing one ofth'e' gears shift-f* ed; Figs'lG is atransverswefseotion on thefline 6 6 of Fig.y 5; Fig: 7 `'isla ftr'ansverseseo 8 is a4 perspective detailfof one'offthejroek broken line 10-10 (yf-Fig 19.9 y r .y

ThSe'VI-al p21-rtsi of thefdevice maybe made ofi any suitable materials', andthe rel`` ative sizes and proportions, as Well asfthe" generalidesign ofthe"` mechanism, may be varied' `to t a consideraloleT extent WithoutI tde` parting' from the' spii'fiti ofVAI the invention hereinafter more' fully"` desbrihedt and' Claimed.

Itho-wget 15 anim-*gear casing-:having substantially atl y"its Center 1a rigid bar '"16"l Which at V17 and 'in "a baringlS isf j ournaled' l medhanis'mfinolliding' la; plnrality of' pini'ons'y 65l riedv the endE off'a vquil-l* 26 which eXten'ds substantially-f.throughout the* length offthe' 70 casing' l5' andsrrofun'dinggthe axle y21. Any suitable-bearings '27 andf28 may-beprovi'ded A to take yup? the vWear'between therelativelyy movablefparts SecuredI rigidly 'in anyf siiit'alole manner 75 within; the-1 casing: 15"50 the quill QGjare/ substantially* parallel spaed plates 29' and, 80. Theplate'29 is shovvn provided vvithan at'taohment 'hulel 31' which extends along@ *the quil-l' fonf yopposite 'sides of 'thef plate, and thev` 80 plate 'is secured toone'part of salidhub; The tvvo` pla-tes, 1 therefore, always maintain preoisely tthesame 'relation to' each' other and to thequlli At32-I sflowfa yseriesfof diagonally *ari 85 ranged arms extendingi from the end of the hub"Vlr 3f' oppositevl the'y plate 30 tangentially outwardly lfrom" the thul)` and' then'c'e 'oni inelineto the'p'eri'pheryf'of"the plate 29.' I

alsov provide "'auxiliary'farms'32 WhichfeX- '90 tend from theprim'ary arms' 'to'thef' late` 29,"on'e 'arm 32'arrd an'ar1'rr32'leadingI rom the 'next' adjacent 'arl'nf 32A'con'stiti`1ting a pair, and all "ofthe'farms secu'red'to the*hubf31 and to the plate constitute vvhat IAm'ayoall' 95 a spiderA for :the "supportfof `certain va'ctuy ating-meohanism describedv later.

Av driving'shaft 19 isi-'shown provided With. I a series; ofldrivng pinionsI a, b, candid; all

rigidly seoiired "as by :shrinkage or 'otherwise '1 00 toaieidfiving Staff and-menge fair driven simu-itaneu'siy-attresmeaagunf vlacay;

Between the 'fplate 3 0 and ltlfe piniorist are la Sei-ies i 'Q f gaat fringe A; Bf; o and Diet-fte spondingto 'and' ,adapted to tmesh" yWith 'said 105 pil'iicirl kfre's"peetively', Alout ally normally "disconnected" therefrom: These' geaijy rings I in' normalem ,neuererfpositionaii 'aantast-ugly i into. 'the respe'tive pinions" ac'ording" to' tle speed desired. 'y e rehtion fori bot'lrthe difret" andA reverse; 6o

Arranged adjacent the face of the plate 29 toward the plate 30 are actuator rings 33 and 34 adapted to be rotated to a certain extent in either direction independently of the plate 29. Each actuator ring has a series of reversely arranged cam members.

These cam members are arranged in pairs and the members of each pair diverge from a common point. See Figs. 4 and 5. Extending from the actuator rings are plungers which are parallel to one another and to the axis of the quill, said plungers extending through the plate 30 and are rigidly secured to the gear rings. Noting again Figs. 4 and 5, the actuator ring 33 is provided with cam members 33aL and 33b having reference especially to the gear rings A and B. The plungers 35a are connected to the gear ring A and are actuated by the cams 33a. Each plunger has a head 36 which receives the direct impact of the actuator ring cam member whereby all of the plungers connected to a single gear ring are forced simultaneously and rigidly toward the axis of the driving shaft 19 and hence into mesh with the corresponding driving pinion. Each head 36, furthermore, is provided with a lip 37 which hooks or engages over into a cam groove 38 parallel to the cam surface which operates said head. The function of the lip and the coperation therewith in the cam groove is for positively withdrawing the gear ring out of driving engagement and back to neutral position. The lips 37 in neutral position occupy places in recesses or notches 39 in the plate 29. At 40, Figs. 4 and 5, I show studs constituting rigid spacers extending from the actuator rings into engagement with the adjacent surface of the plate 30.

At 41 and 42 I show a pair of slidable disks splined to the quill 26 and hence held from rotation thereon. Each slidable disk has a peripheral groove 43 in which is mounted a non-rotary ring 44 acted upon by a shifting yoke 45 secured rigidly to a rock shaft 46 which will be understood as being connected to any suitable controlling lever (not shown).

In each pair of spider arms 32 and 32 is journaled an actuator rock shaft 47 which is adapted to rotate to a certain extent in either direction around its axis arranged transverse to the axis of the quill. Each rock shaft has two cranks 48 and 49 extending therefrom at its opposite ends and in planes Each crank 48V perpendicular to each other. is connected by a link 50 to one of the disks 41 or 42, and the other crank 49 is connected by means of a link 51 to a pin 52 extending through a slot 53 in the plate 29, said pin being rigidly secured to one of the actuator rings 33 or 34. Each disk 41 or 42 has connected to it preferably two of these links 50 on opposite sides of the quill. rlhe links 51 likewise are arranged in pairs on opposite sides of the quill whereby each of the actuator rings is given an impulse at at least two points on opposite sides of its center when the disk 41 or 42 relating thereto is shifted longitudinally of the quill in either direction by means of the yoke mechanism. As above intimated, the disks 41 and 42 have slidable movement only with respect to the quill, and each of them is adapted to be shifted in either direction from the neutral position shown in Fig. 1. The links 50 pivoted to the disk 42 have free movement through the body of the disk 41 in the holes 41.

The operation of the device thus far described may be briefiy summarized as follows: If the disk 41 be shifted toward the right in Fig. 1, the connected parts will be moved in the directions shown by the arrows on Fig. 2, and hence the actuator ring 33 will be rotated so as to cause the plungers 35iL to be actuated by reason of the cams 33a with the result that the gear ring A will be brought into mesh with the pinion a.. The operating thrust upon each gear ring is sustained normally by means of a circumferential shoulder 54 at the end of each of the cam members. The return movement of the disk 41 will disengage the gear ring A and the continued movement of the disk in the return direction will cause the cams 33D to project the next higher speed gear ring B into operating position. Likewise a movement of the disk 42 in either direction will actuate one or the other of the highest speed gears C or D in a manner similar to that above described. The reverse movement of the machine may be effected in any suitable manner from the power shaft, and for this purpose I provide a reverse gear 55 splined to a sleeve 56 keyed to the quill on the opposite side of the hub 16 from the plates 29 and 30, said gear 55 being adapted to mesh with the slow speed pinion a. The reversing gear 55 may be retained in idle position by any suitable means, and it is adapted to be projected into mesh with the pinion by means of a camdisk 57 having cam projections 57 cooperating with correspondingl projections 58 on a fixed member 59. cam disk 57 is adapted to be operated by means of a lever 60 of any suitable construction, the same being connected to the upper portion of the cam disk.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In change speed gearing, the combination of a casing, a driving shaft journaled in the casing, a series of pinions rigidly secured to the driving shaft, a driven shaft j ournaled in the casing at right angles to the driving shaft, a spider fixed to the driven shaft, a series of concentric gear rings surrounding the driven shaft and adapted to be rllhe engaged selectively with the respective pinions, actuator rings carried by the spider and normally rotatable therewith, plungers extending between the actuator rings and the gear rings, and a plurality of rock shafts and cranks adapted to rotate the actuator rings to a certain extent in either direction independently of the rotation of the spider whereby certain of the plungers will cause the engagement of one of the gear rings with its driving pinion.

2. In change speed gearing, the combination of a driving shaft, a series of pinions lfixed thereon, a driven shaft, a series of gear rings surrounding the driven shaft and adapted to mesh with the respective pinions, a plate parallel to the gear rings and having a hub fixed to the driven shaft, an actuator ring associated with said plate and adapted to rotate to a limited degree in either direction independently of the rotation of the plate, said actuator ring having a plurality of series of cam members, a series of plungers secured to each gear ring and adapted to be actuated by one of the series of cam members to cause said gear ring to be moved into engagement with its driving pinion, a plurality of rock shafts journaled on axes parallel to thel driving shaft to rotate the actuator ring, and connections between the rock shafts and the actuator ring whereby the aforesaid rotation thereof is effected.

3. In change speed gearing, the combination of a driving shaft, a plurality of driving pinions secured thereto, a driven shaft arranged at right angles to the driving shaft, a plurality of gear rings surrounding the driven shaft and adapted to mesh selectively with the driving pinions, a pairof plates secured to the driven' shaft parallel to the gear rings, an actuator ring associated with one of said plates and having cam members formed thereon in oppositely arranged pairs, plungers coperating with the respective gear rings through the other of said plates, certain of said plungers being acted upon by one set of cams and the others by the other cams, and means to rotate the actuator ring independently of the rotation of the driven shaft in either direction to pendicular thereto, 'an actuator ring asso` ciated with the platefand having cam members formed thereon inoppositely arranged pairs on the side thereof adjacent the gear rings, plungers cooperating with the respective pairs of cam members, means to rotate the actuator ring in either direction from the normal position independently of the rotation of the plate and driven member'toA `cause certain of the plungers to be actuated in lines 'parallel to the driven shafttocause one or the other of said gear rings tobe op-` erated, said cam members terminating in circular shoulders to make the driving conneci tion of the gears effective, and means cop-y.,` erating with saidplungers to support they same and cause all, of the plungers and gear 5 rings to rotate simultaneously with the driven shaft;y

5. In transmission mechanism, thecombi# nation of a driving shaft, a plurality'of driving pinions secured thereto, adriven shaft, a plurality of gear rings surrounding the driven shaft opposite the respective pinions, a plate secured tothe driven' shaft in' a plane perpendicular thereto, anactuator ringassociated'with said plate, plungersl cooperating with said actuator ring and secured rigidly to saidy gear rings, and a plurality of rock shafts journaledon aXes parallel to said plate and having crank and link connections with said actuator ring, substan` tially as and for the purposes set forth.

In testimony whereof I have 'signed my name to this specification in the presence of tWo subscribing witnesses.

VICTOR H. MCDOUGAL. Witnesses:

IIARREsoN G. SMITH, J. KNELL.

G'opies of this patent may be obtained'for ve cents each, by addressing the Commissioner of Patents, i

` Washington, D. 0., 

